Fall 2017 Resources and Publications

Sustaining the Ogallala Aquifer: From the Wells to People, A Holistic CNH Model
Aistrup, J. A., T. Bulatewicz, L. J. Kulcsar, J. M. Peterson, S. M. Welch and D. R.
StewardHydrology and Earth System Sciences, May 2017
The impact of water policy on sustaining the Ogallala Aquifer is analyzed using a system-level theoretical approach integrating agricultural water and land use tendencies, changing climate, economic trends, and population dynamics.

Advancing Graduate Limnology Education Through Active Learning and Community Partnerships: A Pilot Program at the Large Lakes Observatory
Schreiner, K.M.,S. Katsev, B. Steinman, R.W. Sterner, J. Williams and Kevin Zak
Oceanography Bulletin, 2017At the Large Lakes Observatory at the University of Minnesota Duluth (UMD), we are addressing issues with an outdated limnology graduate curriclum by designing a flipped-classroom, interdisciplinary limnology course sequence that incorporates partnerships with industry, meaningful field and analytical work, and integrated skills learning for our graduate students. 

Significant role of organic sulfur in supporting sedimentary sulfate reduction in low-sulfate environments
Fakhraee, M., J. Li, S Katsev
Geochimica et Cosmochimica Acta, 2017
Dissimilatory sulfate reduction (DSR) is a major carbon mineralization pathway in aquatic sediments, soils, and groundwater, which regulates the production of hydrogen sulfide and the mobilization rates of biologically important elements such as phosphorus and mercury.

Reactivity of triplet excited states of dissolved natural organic matter in stormflow from mixed-use watersheds
McCabe, A.J. and  W.A. Arnold 
Environmental Science & Technology, 2017
Dissolved organic matter (DOM) quantity and composition control the rate of formation (Rf,T) of triplet excited states of dissolved natural organic matter (3DOM*) and the efficiency of 3DOM* formation (the apparent quantum yield, AQYT). Here, the reactivity of 3DOM* in stormflow samples collected from watersheds with variable land covers is examined.

Contrasting nitrogen and phosphorus dynamics in urban watersheds: implications for urban water pollution. 
Hobbie, S.E., J.C Finlay, B., Janke, D.A. Nidzgorski, B. Dylan, D.B. Millet and L.A. Baker
Proceedings of the National Academy of Sciences 2017. 114 (16) 4177-4182.
Urban waters remain widely impaired by excess nutrients, despite substantial management efforts. We present a comparison of urban watershed nitrogen (N) and phosphorus (P) budgets.

Using agricultural system phosphorus balances to improve the TMDL process Detailed P balance for the Albert Lea agricultural watershed: a tool for practical management
Peterson, H., L. Baker, J. Ulrich, J. Neiber, B. Wilson, and D. Bruening. 2017.
Journal of Soil and Water Conservation 72(4): 395-404.
Best management practices implemented to minimize agricultural phosphorus (P) water quality impacts typically focus on retaining nutrients rather than improving P use efficiencies. Although it is now well understood that long-term reduction of P loadings requires achieving a watershed level P balance, this concept is generally not incorporated in watershed planning

Redfield ratios in inland waters: higher biological control of C: N: P ratios in tropical semi-arid high water residence time lakes
They, N.H., A.M. Amado and J. Cotner  
Frontiers in Microbiology, 2017
The canonical Redfield C: N: P ratio for algal biomass is often not achieved in inland waters due to higher C and N content and more variability when compared to the oceans.